Question

explain heart working...​

Answer 1

Blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.

Answer 2

as we all know heart is important organ in our body . it beat about 80 times in 60 sec and 115000 times in a day and 42 millions time in a year.

without heart we cannot be alive.

it pumps with the help of nerves it also helps brain to decide something.